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Message from discussion Principle of Relativity
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PD  
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 More options Nov 2 2009, 6:00 pm
Newsgroups: sci.physics.relativity, sci.physics, sci.math
From: PD <thedraperfam...@gmail.com>
Date: Mon, 2 Nov 2009 10:00:22 -0800 (PST)
Local: Mon, Nov 2 2009 6:00 pm
Subject: Re: Principle of Relativity
On Oct 28, 6:49 pm, Koobee Wublee <koobee.wub...@gmail.com> wrote:

> You can state the principle of relativity in any word salad you want.
> However, the definitive mathematical requirement is very simple and
> elegant.  Consider two points, Point #1 and Point #2, observing each
> other.  It does not involve another point (say Point #0).

> **  [v_12] + [v_21] = 0

OK, but that doesn't have anything to do with the principle of
relativity, nor does it serve as an alternative definition of the
principle of relativity.

> Where

> **  [v_12] = Velocity vector of Point #2 as observed by Point #1
> **  [v_21] = Velocity of Point #1 as observed by Point #2

> Let’s look at the Galilean transform for velocity involving Point #0,
> #1, and #2.

> ** [v_12] = [v_02] – [v_01]
> ** [v_21] = [v_01] – [v_02]

> Where

> **  [v_01] = Velocity of Point #1 as observed by Point #0
> **  [v_02] = Velocity of Point #2 as observed by Point #0

> Thus, Point #0 can be any point to satisfy the result of the very
> first equation.

> Does anyone have any objections?


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